Camera module

ABSTRACT

The present invention relates to a camera module. A camera module according to one aspect comprises: a lens barrel in which a lens part is disposed; a substrate part including a substrate that is disposed below the lens barrel; a housing coupled to the lens barrel; and a heating member electrically connected to the substrate part, wherein the lens barrel includes a first region in which a lens is disposed and a second region disposed spaced apart from the first region, and the heating member is disposed between the first region and the second region.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/765,716, filed May 20, 2020, which is the National Phase of PCTInternational Application No. PCT/KR2018/014933, filed on Nov. 29, 2018,which claims priority under 35 U.S.C. 119(a) to Patent Application No.10-2017-0161786, filed in the Republic of Korea on Nov. 29, 2017, all ofwhich are hereby expressly incorporated by reference into the presentapplication.

TECHNICAL FIELD

The teachings in accordance with exemplary and non-limiting embodimentsof this invention relate generally to a camera module.

BACKGROUND ART

Concomitant with recent popularization of automobiles, the automobileshave been rapidly spread to various strata of people and ages.

An automobile is mounted with a black box camera for protection of theautomobile or obtainment of objective data of traffic accidents, and arear monitoring camera for securing safety of the automobile at the timeof backing-up by monitoring, by a driver, a blind spot (dead zone) ofthe automobile through a screen.

A camera may include a lens module, a lens holder supporting the lensmodule, and an image sensor converting an image of an object collectedby the lens module to an electric signal. A housing forming an outershape of the camera is configured to be tightly-shieled in an entirearea in order to prevent inner parts from being contaminated by foreignobjects including moisture.

In light of the fact that automobiles are characteristically operatedoutdoors, inner and outer temperatures of an automobile may be formed invariable distributions depending on seasons and timings. For example, aninner temperature may be formed to be higher than an outer temperaturein summer, and may drop below zero in winter. Hence, elements includinglens and glass of a camera may be formed with frostiness (condensationphenomenon) in response to rapid changes in temperatures. As a result,disadvantages may be generated including obtainment of unsatisfactoryphotographic materials, and failure of product.

In order to solve these disadvantages, a method has been proposed toremove frosts by arranging a hot wire on a lens and a glass to allowheat to be transmitted to the lens and the glass. However, because ofnarrow spatial characteristics to conform to the trend ofminiaturization of a camera, there is a limitation in arranging a hotwire and elements for supplying a power to the hot wire. Moreover, alens exposed to outside or a hot wire connected to glass require aseparate waterproof structure to disadvantageously increase the numberof parts and an entire volume of product.

DETAILED DESCRIPTION OF THE INVENTION Technical Subject

It is an object of the present exemplary embodiment to provide a cameramodule configured to reduce the number of parts and an entire size of aproduct and to prevent frostiness (condensation phenomenon) includingfrosts from being formed on a lens.

Technical Solution

In one general aspect of the present invention, there is provided acamera module, comprising:

a lens barrel in which a lens part is disposed;

a substrate part including a substrate that is disposed below the lensbarrel; a housing coupled to the lens barrel; and

a heating member electrically connected to the substrate part, whereinthe lens barrel includes a first region in which a lens is disposed anda second region so disposed as to be spaced apart from the first region,and wherein

the heating member is disposed between the first region and the secondregion.

The camera module may include a base connecting the first region and thesecond region.

The lens part may include a first lens and a second lens, wherein thelens barrel may include a protrusion region protruded from the base toan opposite direction of the first region disposed with the second lensand disposed with the first lens.

The second region may include a lateral wall shape encompassing thefirst region.

The heating member may be so disposed as to encompass the lens.

A height of the heating member may be lower than that of the firstregion.

A lower surface of the first region may be spaced apart from thesubstrate part.

A lower surface of the first region may be spaced apart from thesubstrate part.

A part of the second region may be disposed inside the housing.

The heating member may include a resistor.

The second region may include a protrusion-shaped rib formed at anoutside of the lateral wall shape.

The lens barrel may include a guide protrusively formed from the base toa first direction, and a part of the guide may be coupled to a grooveformed on the housing.

Advantageous Effects

The exemplary embodiment of the present invention has an advantage inthat a lens barrel and a lens part are formed in an integrated module,and a heating member is disposed on an outer circumferential surface ofa lens reception part accommodating a lens part to thereby simplify astructure for prevention of frostiness (condensation phenomenon).

Particularly, the exemplary embodiment of the present invention has anadvantage over the prior art in that a separate cover for arrangement ofheating structure or a case is dispensed with to thereby reduce thenumber of parts.

Moreover, another advantage is that a heating member and a powersupplier for providing the power to the heating member are disposed atan inside space of a housing to dispense with a separate waterproofstructure.

Furthermore, still another advantage is that a substrate module disposedwith an image sensor and a lens part are so disposed as to face eachother, and a power provider and a heating member are disposed at an edgeregion thereof to enable to obtain a broader space in disposition ofparts.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a camera module according to anexemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view of a camera module according to anexemplary embodiment of the present invention.

FIG. 3 is an exploded perspective view of a camera module according toan exemplary embodiment of the present invention.

FIG. 4 is an exploded perspective view of a camera module illustrated ata different angle according to an exemplary embodiment of the presentinvention.

FIG. 5 is a cross-sectional view taken along line A-A′ of FIG. 1.

FIG. 6 is a cross-sectional view taken along line B-B′ of FIG. 4.

BEST MODE

Some exemplary embodiments of present invention will be described indetail with reference to the accompanying drawings. In describing areference numeral for each element, a same reference numeral will bedesignated, if possible, for the same element, albeit being differentlyindicated on other drawings.

In describing elements in the exemplary embodiments of the presentinvention, the terms, first, second, A, B (a), (b), etc., may be used.These terms may be used only to distinguish one element from anotherelement, and the nature, order or sequence is not restricted by theseterms. When an element is referred to as being “accessed to”, “coupledto,” or “connected to,” another element, it should be appreciated thatthe element may be directly accessed, connected or coupled to the otherelement, or intervening elements may be present therebetween.

FIG. 1 is a perspective view of a camera module according to anexemplary embodiment of the present invention, FIG. 2 is across-sectional view of a camera module according to an exemplaryembodiment of the present invention, FIG. 3 is an exploded perspectiveview of a camera module according to an exemplary embodiment of thepresent invention, and FIG. 4 is an exploded perspective view of acamera module illustrated at a different angle according to an exemplaryembodiment of the present invention.

Referring to FIGS. 1 to 4, a camera module (100) according to anexemplary embodiment of the present invention may include a housing(40), and a lens module (10) coupled to the housing (40).

The housing (40) may substantially take a square shape in across-section thereof, and may be formed therein with an inner space(44) to accommodate one or more electronic parts. The electronic partsdisposed in the inner space (44) may include a substrate part (60)mounted with an image sensor (62) and a shield can (70) encompassing thesubstrate part (60).

The lens module (10) may include a lens barrel (15) and a lens part (11)accommodated into the lens barrel (15). To be more specific, the lensbarrel (15) may include a base region (15 a) extended to a directionperpendicular to an optical axis, a first lens reception part (13)protruded upwardly from an upper surface of the base (15 a) toaccommodate therein the lens part (11), a partition part (20) protrudeddownwardly from a lower surface of the base (15 a) to accommodatetherein a space part (21) and a second lens reception part (24).

Furthermore, the lens part (11) may include a first lens and a secondlens.

The first lens reception part (13) may be called a protrusion region interms of the fact that the first lens reception part (13) is upwardlyprotruded relatively over other regions. Furthermore, the protrusionregion may be disposed with the first lens. Moreover, the second lensmay be disposed in the second lens reception part (24).

The lens barrel (15) and the housing (40) may be hook-coupled. To thisend, the lens barrel (15) may be formed with a rib (17) protrudeddownwardly from a lower surface of the base (15 a). The rib (17) may bedisposed at an outer circumferential surface of the partition part (20).The lens barrel (15) may be disposed with a guide (18) protruded from alower surface of the base (15 a) to arrange the rib (17) at an insidethereof. The guide (18) may be disposed at an outside of the partitionpart (20). Therefore, the rib (17) may face an external surface of thepartition part (20), and the external surface may face an internalsurface of the guide (18). A protruding height of the guide (18) may beformed to be lower than that of the partition part (20). In addition,the rib (17) may be disposed at an outer circumferential surface of thepartition part (20) to prevent the partition part (20) from being bentor deformed.

The rib (17) may be formed in a plural number, and may be so disposed asto be mutually spaced apart along an external surface of the partitionpart (20).

Meantime, the lens barrel (15) may be formed with a non-conductivemetal.

The partition part (20) may be disposed at an inside of the housing (40)when the housing (40) and the lens module (10) are coupled, and aninside of the partition part (20) may be disposed with a second lensreception part (24). Furthermore, the second lens reception part (24)may be formed with a space part (21) in order to be spaced apart from aninner surface of the partition part (20).

In other words, when the second lens reception part (24) disposed with alens is called a first region, an outside of the first region may bedisposed with a second region. Furthermore, the space part (21) may beinterpreted as a groove interposed between the first region and thesecond region. In other word, the second region may encompass the firstregion, and the groove may be formed along the first region and thesecond region.

Hereinafter, the first region may mean the second lens reception part(24), the second region may mean the partition part (20), and the spacepart (21) may mean the groove respectively, and these meanings may beinterchangeably used for convenience of explanation. Meantime, the firstregion may be disposed with a cavity in which a lens is inserted.

An inside of the housing (40) may be formed with a rib groove (42) inwhich the rib (17) is received. The rib groove (42) may be disposed at arelatively upper side of the inside of the housing (40). When the lensmodule (10) is coupled to the housing (40), the rib (17) may beaccommodated into the rib groove (42). Furthermore, the rib groove (42)may accommodate the guide (18) to allow the lens barrel (15) to becoupled with the housing (40).

An end region of the rib (17) may be protrusively formed with a hitchingpart to be hitched by the rib groove (42). When the lens module (10) andthe housing (40) are coupled, a region disposed underneath based on thebase (15 a) may be disposed on an inner space (44) formed inside thehousing (40). As a result, only a lateral surface of the base (15 a) maybe exposed to an outside.

A lower surface of base (15 a) may be disposed with a second lensreception part (24) downwardly protruded from a lower surface of base(15 a) to be received into the space part (21). The second lensreception part (24) may be formed therein with a lens reception spaceinto which the lens part (11) is received. Furthermore, an inside of thefirst lens reception part (13) disposed at an upper surface of base (15a) may be also formed with a lens reception space into which the lenspart (11) is received. The inside of the first lens reception part (13)and the inside of the second lens reception part (24) may be mutuallycommunicated. A cross-sectional area of the second lens reception part(24) may be formed to be smaller than that of the first lens receptionpart (13).

The lens part (11) may include at least one lens in order to collect animage of external subject. The lens part (11) may be disposed with aplurality of lenses each spaced apart to upper/lower directions. Thelens part (11) may be disposed in a lens reception space formed at aninside of the first lens reception part (13) and at an inside of thesecond lens reception part (24). Furthermore, the plurality of lensesdisposed at the lens reception space may be so disposed as to bearranged with a lens having a relatively smaller cross-section toward alower side. Meantime, a cross-section of the first lens reception part(13) and a cross-section of the second lens reception part (24) may beformed with a circular shape.

The substrate part (60) may be disposed at an inner space (44) of thehousing (40). The substrate part (60) may include a first substrate(64), and a second substrate (66) disposed at a lower side of the firstsubstrate (64).

The first substrate (64) may be disposed at a lower side of the secondlens reception part (24). A lower surface of the first substrate (64)and a lower surface of the second lens reception part (24) may face eachother. An upper surface of the first substrate (64) may be disposed withan image sensor (26) arranged on an optical axis of the lens part (11).The image sensor (26) may be so disposed as to form an optical axis withthe lens part (11) to allow obtaining a photographic material byconverting an image of subjects collected on the lens part (11) to anelectric signal.

Meantime, based on an upper surface of the substrate part (60), a lowersurface of the first region may be positioned to be higher than that ofthe second region. Furthermore, a lower surface of the first region maybe spaced apart from the substrate part (60), and a lower surface of thesecond region may be brought into contact with the substrate part (60).If necessary, an adhesive member may be interposed between the secondregion and the substrate part (60).

A lower surface of second lens reception part (24) may be formed with asensor reception part (26) to allow the image sensor (26) to bereceived. The image sensor reception part (26) may be recessed upwardlyover other regions. The sensor reception part (26) may be so disposed asto match a cross-sectional shape of the image sensor (26). An edgeregion of the sensor reception part (26) may be disposed with a guiderib (25) dividing the other region of lower surface of the second lensreception part (24) from the sensor reception part (26). The guide rib(25) may be protrusively formed from an edge region of the image sensorreception part (26) toward a lower side of the second lens receptionpart (13) in order to support a lateral surface of the image sensor(26). The guide rib (25) may be disposed in a plural number along anedge region of the image sensor (26), each spaced apart from the other.Hence, an upper surface of image sensor (26) may be disposed on areception surface of the sensor reception part (26), and a lower surfacemay be mounted on an upper surface of the first substrate (64).Furthermore, a region formed with the sensor reception part (26) on thelower surface of the second lens reception part (24) may be an areamatching to the lens part (11) to an optical axis direction when theimage sensor (26) is to be coupled.

The second substrate (66) may be disposed at a lower side of firstsubstrate (64). The first substrate (64) may be disposed with the secondsubstrate (66) spaced apart to an upper and lower direction. The firstsubstrate (64) may be electrically connected to the second substrate(66). The first substrate (64) and the second substrate (66) may beelectrically connected through an FPCB. The second substrate (66) may beconnected to a connector (not shown). The connector may be coupled atone end to a lower surface of second substrate (66) and may be exposedat the other end to an outside. Toward this end, a lower surface ofhousing (40) may be formed with a connector terminal (90) in order toexpose the connector to the outside. The connector terminal (90) may beformed at an inside with a terminal hole (91), and may be exposed to theconnector and the outside through the terminal hole (91).

Meantime, as shown in FIG. 2, a shape of one edge and a shape of theother edge on an upper surface of lens barrel (15) according to anexemplary embodiment of the present invention may be mutually different.This is because a contact position of the first substrate (64) and thatof the second substrate (66) are mutually different.

To be more specific, based on FIG. 2, the FPCB may be attached to aright side of the first substrate (64). The lens barrel (15) must beattached relatively to a more inner side on the first substrate (64)than the FPCB. Furthermore, a left side of the first substrate (64) maybe a region where the FPCB is not attached. Thus, in order for the lensbarrel (15) to be attached to an edge region instead of an inner sideregion of the first substrate (64), a groove is structurally formed toan outside of the lens barrel (15) which is not a straight line.Therefore, an upper edge region of the lens barrel (15) may includeregions each having a different shape.

FIG. 5 is a cross-sectional view taken along line A-A′ of FIG. 1, andFIG. 6 is a cross-sectional view taken along line B-B′ of FIG. 4.

Referring to FIGS. 2 to 6, an outer circumferential surface of thesecond lens reception part (24) may be disposed with a heating member(50). The heating member (50) is a heating body generating a heat byreceiving a power, where the generated heat may be transmitted to thelens part (11) to prevent the lens part (11) from being formed with thefrostiness. The heating member (50) may be interpreted to be disposed ona groove between the first region and the second region. Furthermore,the heating member (50) may be shorter in a length to direction parallelwith an optical axis than a length of the said groove.

The heating member (50) may be a plate-shaped heating sheetcorresponding to an outer cross-section of the second lens receptionpart (24). At this time, the outer circumferential surface of the secondlens reception part (24) may be encompassed by allowing one end and theother end of the heating sheet to be mutually joined. This is to beinterpreted as the heating member (50) having a shape to encompass thelens.

In another example, the heating member (50) may include one or more hotwires. The said more than one hot wire may be spirally wound on an outercircumferential surface of the second lens reception part (24) to allowthe more than one hot wire to be mutually spaced apart, whereby the lenspart (11) may be transmitted with a heat.

The heating member (50) may be a transparent electrode. The transparentelectrode may be an element to generate a heat by receiving a power andmay be a transparent heating membrane coated with a conductive ITO(Indium Thin Oxide) configured to generate a heat using an intrinsicresistance component. However, the ITO is simply an exemplary and itshould be interpreted that any material of transparent electrodeconfigured to generate a heat by being electrically connected may beapplied thereto.

As illustrated in FIG. 4, the heating member (50) may receive the powerfrom a power supplier (52). The power supplier (52) may be electricallyconnected at one end to the heating member (50), and electricallyconnected at the other end to first substrate (64). Thus, the powerapplied from an outside through a connector may be provided to thesecond substrate (66) and to the heating member (50) passing through thesecond substrate (66). In short, the heating member (50) may be aresistance in which a current from the substrate part (60) flows.

As a result, the heat generated from the heating member (50) may betransmitted to the lens part (11) disposed at an inside of the secondlens reception part (24) and prevent the frostiness from being formed onthe lens part (11). It should be apparent that the heat generated fromthe heating member (50) is transmitted to the lens part (11) disposed atan inside of the first lens reception part (13).

According to the abovementioned configuration, the lens barrel and thelens part are integrally formed in one integral module, and a heatingmember is disposed at an outer circumferential surface of the lensreception part accommodating the lens part to advantageously prevent thefrostiness in a simple structure. Particularly, there is no need of aseparate cover or a separate cover for arranging a heating structureunlike the prior art to advantageously reduce the number of parts.

Furthermore, a heating member and a power supplier for providing a powerto the heating member are disposed at an inner space of a housing toadvantageously dispense with a separate waterproof structure. Stillfurthermore, a substrate module disposed with an image sensor are madeto face a lens part and a power supplier and a heating member aredisposed at an edge thereof to advantageously secure a broader space inarranging parts.

Although the present disclosure has been explained with all constituentelements forming the exemplary embodiments of the present disclosure bybeing combined in one embodiment, or by being operated in oneembodiment, the present disclosure is not limited thereto. That is, allelements may operate by allowing one or more elements to be selectivelycombined as long as within the scope of object of the invention.Furthermore, terms such as “includes”, “including”, “have”, “having”,“comprises” and/or “comprising” as used herein mean that the relevantelements are embedded, unless otherwise described, such that thementioned elements are not excluded but may be further included.

Unless otherwise defined, all terms including technical and scientificterms used herein have the same meaning as commonly understood by one ofordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein. The foregoingexplanations are intended only to be illustrative of the technical ideasof the present invention, and therefore, it should be appreciated by theskilled in the art that various modifications and amendments to theabove examples may be made without deviating from the scope ofprotection of the invention.

1. A camera module comprising: a lens module; a housing coupled to thelens module a substrate part disposed between the lens module and thehousing; and a heating member disposed on a portion of the lens module,wherein the lens module includes: a base disposed on an upper surface ofthe housing; a first lens accommodating part protruding upward from aninner surface of the base; a second lens accommodating part protrudingdownward from a lower surface of the first lens accommodating part; anda lens part disposed inside the first lens accommodating part and thesecond lens accommodating part, wherein the heating member is disposedoutside the second lens accommodating part.
 2. The camera module ofclaim 1, wherein the lens module includes a partition wall disposedoutside the second lens accommodating part.
 3. The camera module ofclaim 2, wherein a space is formed between the partition wall and thesecond lens accommodating part.
 4. The camera module of claim 1, whereinthe heating member is so disposed as to encompass the lens.
 5. Thecamera module of claim 1, wherein a height of the heating member islower than that of the second lens accommodating part.
 6. The cameramodule of claim 1, wherein a lower surface of the second lensaccommodating part is spaced apart from the substrate part.
 7. Thecamera module of claim 6, wherein a lower surface of the second lensaccommodating part is spaced apart from the substrate part.
 8. Thecamera module of claim 2, wherein a part of the partition wall isdisposed inside the housing.
 9. The camera module of claim 1, whereinthe heating member includes a resistor.
 10. The camera module of claim2, wherein the partition wall includes ribs projecting from an outersurface, and wherein the ribs are provided in plurality and are spacedapart from each other.
 11. The camera module of claim 2, wherein thelens module includes a guide protrusively formed from the base to afirst direction, and a part of the guide is coupled to a groove formedon the housing.
 12. The camera module of claim 11, wherein a projectingheight of the guide from the base is formed lower than a projectingheight of the partition wall from the base.
 13. The camera module ofclaim 10, wherein a rib groove is formed on an inner surface of thehousing so that the rib is engaged.
 14. The camera module of claim 2,wherein a lower surface of the second lens accommodating part isdisposed higher than a lower surface of the partition wall based on theupper surface of the substrate part.
 15. The camera module of claim 1,wherein a sensor seating portion is disposed on the lower surface of thesecond lens accommodating part to arrange an image sensor.
 16. Thecamera module of claim 15, wherein a guide rib is disposed in an edgeregion of the sensor seating portion.
 17. The camera module of claim 1,wherein the substrate part includes a first substrate on which an imagesensor is disposed on an upper surface, and a second substrate disposedbelow the first substrate, and wherein the first substrate and thesecond substrate are electrically connected through a FPCB.
 18. Thecamera module of claim 17, wherein a power supply unit includes one endelectrically connected to the heating member and an other endelectrically connected to the first substrate.
 19. The camera module ofclaim 1, wherein a cross-sectional area of the second lens accommodatingpart is smaller than a cross-sectional area of the first lensaccommodating part.
 20. A camera module comprising: a lens barrel inwhich a lens part is disposed; a substrate part including a substratethat is disposed below the lens barrel; a housing coupled to the lensbarrel; and a heating member electrically connected to the substratepart, wherein the lens barrel includes a lens accommodating portion inwhich a lens is disposed, a partition portion disposed outside the lensaccommodating portion, and a groove disposed between the partitionportion and the lens accommodating portion, and wherein the heatingmember is disposed in the groove.